[shared_preferences] Increase minimum android endorsed version (#8318)

**Bump shared preferences android version that is endorsed so that more
devs pick up the security change**


## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] page, which explains my
responsibilities.
- [x] I read and followed the [relevant style guides] and ran the
auto-formatter. (Unlike the flutter/flutter repo, the flutter/packages
repo does use `dart format`.)
- [x] I signed the [CLA].
- [x] The title of the PR starts with the name of the package surrounded
by square brackets, e.g. `[shared_preferences]`
- [ ] I [linked to at least one issue that this PR fixes] in the
description above.
- [x] I updated `pubspec.yaml` with an appropriate new version according
to the [pub versioning philosophy], or this PR is [exempt from version
changes].
- [x] I updated `CHANGELOG.md` to add a description of the change,
[following repository CHANGELOG style], or this PR is [exempt from
CHANGELOG changes].
- [ ] I updated/added relevant documentation (doc comments with `///`).
- [ ] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] All existing and new tests are passing.

Author: reidbaker

packages/shared_preferences/shared_preferences/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.3.4
+
+* Security update, requires shared_preferences_android to be 2.3.4.
+
 ## 2.3.3
 
 * Clarifies scope of prefix handling in README.

packages/shared_preferences/shared_preferences/pubspec.yaml

@@ -3,11 +3,11 @@ description: Flutter plugin for reading and writing simple key-value pairs.
   Wraps NSUserDefaults on iOS and SharedPreferences on Android.
 repository: https://github.com/flutter/packages/tree/main/packages/shared_preferences/shared_preferences
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+shared_preferences%22
-version: 2.3.3
+version: 2.3.4
 
 environment:
-  sdk: ^3.4.0
-  flutter: ">=3.22.0"
+  sdk: ^3.5.0
+  flutter: ">=3.24.0"
 
 flutter:
   plugin:
@@ -28,7 +28,7 @@ flutter:
 dependencies:
   flutter:
     sdk: flutter
-  shared_preferences_android: ^2.3.0
+  shared_preferences_android: ^2.3.4
   shared_preferences_foundation: ^2.5.0
   shared_preferences_linux: ^2.4.0
   shared_preferences_platform_interface: ^2.4.0